<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
<link rel="stylesheet" type="text/css" href="a.css" media="screen and (max-width:1200px)"/>
<link rel="stylesheet" type="text/css" href="b.css" media="screen and (min-width:1201px)"/>
	</head>
	<body>
	</body>
</html>
